Total
length		Length
of tail		Length
of
hind
foot		Basilar
length		Length
of
nasals		Zygomatic
breadth		Mastoid
breadth		Interorbital
breadth		Alveolar
length
of
upper
molar
series		Extension
of
premax
post. to
nasals		Length
of
rostrum		Breadth
of
rostrum
No. 191959 (U. S. N. M.) T. b. levidensis, 1; topotype
222 65 28 33.3 12.7 24.5 19.0 6.5 7.6 3.3 15.1 8.0
T. b. convexus, 6; topotypes
Av. 213 59 28 33.1 14.3 24.9 21.7 6.6 8.0 2.6 16.2 8.2
Min. 206 57 27 31.3 13.9 23.8 21.0 6.5 7.7 2.1 15.2 8.0
Max. 233 68 29 35.0 14.6 26.7 22.3 6.8 8.1 2.8 17.2 8.6
T. b. tivius, 7; topotypes
Av. 208 69 27 31.5 12.2 22.4 18.4 6.4 7.2 2.4 14.0 7.1
Min. 199 67 25 29.3 11.9 20.6 17.1 6.0 7.0 2.1 13.2 6.5
Max. 227 70 30 34.1 12.8 25.0 19.8 6.6 7.6 3.0 15.0 7.9
T. b. bonnevillei, 3; topotypes
Av. 228 70 30 35.4 13.9 26.4 21.8 6.6 8.1 3.7 17.6 8.5
Min. 221 62 30 33.6 13.2 25.4 20.5 6.5 8.1 3.4 16.1 8.2
Max. 236 79 30 37.4 14.9 28.0 22.5 6.7 8.1 4.3 18.1 8.7
T. b. sevieri, 3; topotypes
Av. 216 67 30 32.7 12.9 22.9 18.7 6.4 7.2 2.5 15.3 7.6
Min. 210 66 29 31.7 11.8 22.2 18.0 6.2 7.0 1.8 14.5 7.5
Max. 222 68 31 33.5 13.5 23.4 19.3 6.7 7.2 3.0 16.4 7.7
T. b. wahwahensis, 4; topotypes
Av. 228 66 29 34.7 13.5 25.5 20.7 6.6 7.3 2.3 15.7 8.7
Min. 210 60 26 33.0 13.1 24.6 20.1 6.5 7.0 2.2 14.9 8.5
Max. 250 78 30 37.6 14.6 27.0 21.4 6.8 8.0 2.5 17.1 9.0
T. b. planirostris, 8; topotypes (Burt, 1931:39)
Av. 238 76 32 35.6 13.8 25.9 20.4 6.6 8.5 3.7 .... 8.8
Min. 222 66 31 33.3 12.5 24.4 19.8 6.2 8.2 3.0 .... 8.3
Max. 261 83 34 38.7 15.3 27.6 21.3 7.2 8.9 4.5 .... 9.4
T. b. birdseyei, 3; topotypes
Av. 227 64 31 34.9 13.8 26.2 20.9 6.2 8.4 2.6 16.3 8.3
Min. 214 52 30 34.5 13.1 26.0 20.1 6.0 8.1 2.2 16.0 8.2
Max. 243 81 32 35.2 14.1 27.4 21.5 6.5 8.8 2.8 16.9 8.4
T. b. virgineus, 5; Beaverdam Wash, 5 mi. N Utah-Arizona Line
Av. 226 68 29 34.6 13.5 25.6 20.7 6.3 8.0 3.0 16.5 8.5
Min. 216 62 27 33.5 12.8 25.0 20.0 6.1 7.6 2.4 15.3 8.3
Max. 235 70 30 34.9 14.4 26.0 21.1 6.6 8.4 3.5 17.4 8.7
T. b. aureus, 3; topotypes
Av. 242 68 34 36.6 14.3 25.3 21.4 6.6 8.3 2.4 17.2 8.7
Min. 233 65 32 35.3 13.8 24.6 20.6 6.4 7.7 2.0 16.7 8.3
Max. 251 70 36 37.8 14.9 25.8 22.0 6.8 8.7 2.5 17.9 9.0

Measurements of Adult Males of Thomomys—Concluded

Total
length		Length
of tail		Length
of
hind
foot		Basilar
length		Length
of
nasals		Zygomatic
breadth		Mastoid
breadth		Interorbital
breadth		Alveolar
length
of
upper
molar
series		Extension
of
premax
post. to
nasals		Length
of
rostrum		Breadth
of
rostrum
T. b. howelli, 5; 10 mi. N Moab
Av. 213 67 31 33.1 13.5 23.2 20.1 6.5 8.3 2.5 16.1 8.8
Min. 205 64 30 31.8 12.8 22.8 18.9 6.4 8.0 2.3 15.1 8.1
Max. 225 68 32 35.3 14.3 24.1 20.7 6.8 8.8 2.8 17.5 9.4
No. 3094 (U. U.) T. b. absonus, 1; topotype
220 71 29 32.0 13.9 22.6 19.0 6.4 7.0 1.0 15.1 7.2
No. 158529 (U. S. N. M.) T. b. osgoodi, 1; topotype
225 70 29 33.8 13.3 22.7 19.6 6.6 8.4 3.2 16.5 8.3
T. b. alexandrae, 1; topotype (Benson, 1935:450)
205 59 27 33.9 13.7 24.3 19.7 6.5 8.0 ... 15.8 8.1

Measurements of Adult Females of Thomomys
(In millimeters)

Total
length		Length
of tail		Length
of
hind
foot		Basilar
length		Length
of
nasals		Zygomatic
breadth		Mastoid
breadth		Interorbital
breadth		Alveolar
length
of
upper
molar
series		Extension
of
premax
post. to
nasals		Length
of
rostrum		Breadth
of
rostrum
T. b. aureiventris, 2; topotypes (Hall, 1930:446)
Av. 212 62 30 32.4 12.9 22.9 19.4 6.7 7.4 2.8 .... ...
Min. 208 58 29 31.8 12.6 22.5 18.9 6.6 7.0 2.7 .... ...
Max. 215 65 30 33.0 13.1 23.3 19.8 6.8 7.8 3.1 .... ...
T. b. centralis, 17; topotypes (Hall, 1930:446)
Av. 214 67 29 31.8 12.6 22.1 19.0 6.6 7.6 2.7 .... ...
Min. 195 55 27 30.5 11.9 21.3 18.2 5.9 7.0 2.0 .... ...
Max. 229 75 30 33.0 13.8 23.1 20.1 7.1 7.8 3.4 .... ...
T. b. albicaudatus, 4; topotypes (Hall, 1930:446)
Av. 211 64 30 32.5 12.9 22.9 18.8 6.6 7.7 2.7 .... ...
Min. 199 55 29 31.7 11.9 21.9 18.2 6.1 7.5 2.6 .... ...
Max. 219 70 32 33.8 13.5 24.0 19.5 6.8 8.0 3.0 .... ...
T. b. robustus, 11; topotypes
Av. 199 61 27 30.6 11.7 22.6 18.8 6.4 7.6 2.6 13.9 7.4
Min. 191 56 22 29.0 10.6 21.0 18.1 6.2 7.1 2.0 12.0 7.1
Max. 207 66 29 31.6 12.2 23.6 19.8 6.7 8.0 2.9 14.7 7.9
T. b. stansburyi, 5; topotypes
Av. 202 57 28 31.1 12.1 21.9 18.7 6.5 7.7 2.6 14.5 7.4
Min. 195 56 26 29.9 10.6 21.0 17.8 6.2 7.3 2.3 13.4 6.9
Max. 210 63 30 32.7 12.8 22.4 19.5 6.8 8.0 3.0 15.2 7.7
No. 900 (U. U.) T. b. nesophilus, 1; topotype
210 65 31 31.2 12.3 23.2 19.3 6.9 8.2 2.2 15.2 7.3
T. b. minimus, 2; topotypes
Av. 178 56 25 28.2 10.6 19.7 17.4 6.1 7.0 2.3 13.1 6.7
Min. 175 54 24 28.1 10.4 19.6 17.1 6.1 7.0 2.3 13.0 6.5
Max. 181 58 25 28.2 10.8 19.7 17.7 6.1 7.0 2.3 13.2 6.8
T. b. contractus, 6; topotypes
Av. 219 68 30 33.1 12.6 23.3 19.5 6.5 7.8 2.6 15.5 7.1
Min. 208 58 29 32.2 12.0 22.2 18.9 6.4 7.6 2.3 14.2 7.0
Max. 225 73 31 34.7 13.3 25.2 20.6 6.7 8.2 3.2 17.0 7.3
T. b. levidensis, 4; topotypes
Av. 205 69 26 30.5 11.1 21.7 17.5 6.6 7.5 2.9 14.0 7.0
Min. 194 61 26 29.3 10.6 21.5 17.3 6.3 7.2 2.8 13.0 6.9
Max. 223 73 27 30.8 11.5 21.9 17.9 6.9 7.8 3.2 14.7 7.2